Why nighttime heat can be so dangerous — and why it’s getting worse

Forecasters are warning that there is a more dangerous aspect to heat waves these days: overnight temperatures are not cooling down enough

​CNN.com – RSS Channel Forecasters are warning that there is a more dangerous aspect to heat waves these days: overnight temperatures are not cooling down enough 

​Read More Forecasters are warning that there is a more dangerous aspect to heat waves these days: overnight temperatures are not cooling down enough